define( [
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"../core",
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"../var/document",
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"../core/init",
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"../deferred"
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], function( jQuery, document ) {
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// The deferred used on DOM ready
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var readyList;
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jQuery.fn.ready = function( fn ) {
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// Add the callback
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jQuery.ready.promise().done( fn );
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return this;
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};
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jQuery.extend( {
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// Is the DOM ready to be used? Set to true once it occurs.
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isReady: false,
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// A counter to track how many items to wait for before
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// the ready event fires. See #6781
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readyWait: 1,
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// Hold (or release) the ready event
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holdReady: function( hold ) {
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if ( hold ) {
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jQuery.readyWait++;
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} else {
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jQuery.ready( true );
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}
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},
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// Handle when the DOM is ready
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ready: function( wait ) {
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// Abort if there are pending holds or we're already ready
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if ( wait === true ? --jQuery.readyWait : jQuery.isReady ) {
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return;
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}
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// Remember that the DOM is ready
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jQuery.isReady = true;
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// If a normal DOM Ready event fired, decrement, and wait if need be
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if ( wait !== true && --jQuery.readyWait > 0 ) {
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return;
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}
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// If there are functions bound, to execute
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readyList.resolveWith( document, [ jQuery ] );
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// Trigger any bound ready events
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if ( jQuery.fn.triggerHandler ) {
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jQuery( document ).triggerHandler( "ready" );
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jQuery( document ).off( "ready" );
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}
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}
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} );
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/**
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* The ready event handler and self cleanup method
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*/
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function completed() {
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document.removeEventListener( "DOMContentLoaded", completed );
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window.removeEventListener( "load", completed );
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jQuery.ready();
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}
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jQuery.ready.promise = function( obj ) {
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if ( !readyList ) {
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readyList = jQuery.Deferred();
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// Catch cases where $(document).ready() is called
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// after the browser event has already occurred.
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// Support: IE9-10 only
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// Older IE sometimes signals "interactive" too soon
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if ( document.readyState === "complete" ||
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( document.readyState !== "loading" && !document.documentElement.doScroll ) ) {
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// Handle it asynchronously to allow scripts the opportunity to delay ready
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window.setTimeout( jQuery.ready );
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} else {
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// Use the handy event callback
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document.addEventListener( "DOMContentLoaded", completed );
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// A fallback to window.onload, that will always work
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window.addEventListener( "load", completed );
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}
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}
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return readyList.promise( obj );
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};
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// Kick off the DOM ready check even if the user does not
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jQuery.ready.promise();
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} );
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